/*
 * Copyright (C) 2009,2010 University of Paderborn, Computer Networks Group
 * Copyright (C) 2009,2010 Christian Dannewitz <christian.dannewitz@upb.de>
 * Copyright (C) 2009,2010 Thorsten Biermann <thorsten.biermann@upb.de>
 * 
 * Copyright (C) 2009,2010 Eduard Bauer <edebauer@mail.upb.de>
 * Copyright (C) 2009,2010 Matthias Becker <matzeb@mail.upb.de>
 * Copyright (C) 2009,2010 Frederic Beister <azamir@zitmail.uni-paderborn.de>
 * Copyright (C) 2009,2010 Nadine Dertmann <ndertmann@gmx.de>
 * Copyright (C) 2009,2010 Michael Kionka <mkionka@mail.upb.de>
 * Copyright (C) 2009,2010 Mario Mohr <mmohr@mail.upb.de>
 * Copyright (C) 2009,2010 Felix Steffen <felix.steffen@gmx.de>
 * Copyright (C) 2009,2010 Sebastian Stey <sebstey@mail.upb.de>
 * Copyright (C) 2009,2010 Steffen Weber <stwe@mail.upb.de>
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the University of Paderborn nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package netinf.node.transfer;

import java.util.ArrayList;
import java.util.List;

import netinf.common.transfer.TransferJob;

/**
 * An {@link ExecutableTransferJob} is a {@link TransferJob} that has the capability to inform possible {@link TransferListener}
 * about changes of the underlying transfer (like, e.g. in case the TransferJob is finished). It might be started and has an
 * additional status which determines whether this {@link TransferJob} has finished or not.
 * 
 * @author PG Augnet 2, University of Paderborn
 */
public abstract class ExecutableTransferJob extends TransferJob {

   private final List<TransferListener> transferListeners;

   public ExecutableTransferJob(String jobId, String source, String destination) {
      super(jobId, source, destination);

      transferListeners = new ArrayList<TransferListener>();
   }

   public void addListener(TransferListener transferListener) {
      transferListeners.add(transferListener);
   }

   public void removeListener(TransferListener transferListener) {
      transferListeners.remove(transferListener);
   }

   protected void notifyListeners() {
      for (TransferListener transferListener : transferListeners) {
         transferListener.notifyChanged(this);
      }
   }

   @Override
   public void setSource(String source) {
      super.setSource(source);
      notifyListeners();
   }

   @Override
   public void setDestination(String destination) {
      super.setDestination(destination);
      notifyListeners();
   }

   public abstract void startTransferJob();

   public abstract boolean isCompleted();

}
